i checked my images and nope. The image is clean. That line is the same color as my table borders. It changes of color when i change it in my styles edit.
I can't tell what template that is that you took a screenshot of. I'm guessing that it's in your postbit. If that's the case, you need to review your code in that template.
Another option, although kinda messy with vB, is to validate your code with the W3C [link]. It's going to give you a lot of errors because of the vB specific code, but it can also help you ferret out where your missing table tag is.
noo..it is the current online members thing...that appears in the top of the homepage. In front of the categories. I have find out that it is the line that the category spacer mod put in the top of every category(space.gif). Is there a way to just delete the one of the top and leave the lines in the others categories.